Somewhere along the line the detection of the 80c U66 ribbon was missed.
I just reworked the code last night and found a goofy.
If you try to set -X67/68 and the flag for "detection of the 80c U66"
is not set, you can not ever force the host/drive into these modes.
On Fri, 19 May 2000, Tony Hoyle wrote:
> Mark Hahn wrote:
> >
> > > > I do know that hdparm reported the two hard drives in the machine I was
> > > > testing to be using udma mode 4 (udma66 IIRC)
> > > >
> > > Are you sure... hdparm on my board states that the drives are capable of
> > > udma mode 4, but
> > > that they are not running it. If I use hdparm -X (yes I know very
> > > dangerous) I get the
> > > error 'udma mode 3/4 not suppported'
> >
> > modern kernels (I looked at pre9-2, I think) definitely have code to
> > support the controller. if you know you've got it configured into
> > your kernel, then perhaps you should check the PCI ide of it (82801).
> > also, Linux does generally trust/rely on the bios to set up initial
> > disk modes...
>
> Now I'm really confused.... The chipset is recognised but hdparm has
> switched
> to Udma2 and won't switch out of it!
>
> In /proc/ide/piix:
>
> Intel PIIX4 Ultra 66 Chipset.
> --------------- Primary Channel ---------------- Secondary Channel
> -------------
> enabled enabled
> --------------- drive0 --------- drive1 -------- drive0 ----------
> drive1
> ------
> DMA enabled: yes no yes yes
> UDMA enabled: yes no no no
> UDMA enabled: 4 X X X
> UDMA
> DMA
> PIO
>
> Output from hdparm -i /dev/hda:
>
> Model=Maxtor 53073U6, FwRev=DA6207V0, SerialNo=K607RFNC
> Config={ Fixed }
> RawCHS=16383/16/63, TrkSize=0, SectSize=0, ECCbytes=57
> BuffType=3(DualPortCache), BuffSize=2048kB, MaxMultSect=16,
> MultSect=off
> DblWordIO=no, maxPIO=2(fast), DMA=yes, maxDMA=0(slow)
> CurCHS=16383/16/63, CurSects=16514064, LBA=yes, LBAsects=60030432
> WARNING 43516368 ORPHANED SECTORS :: KERNEL REPORTING ERROR
> tDMA={min:120,rec:120}, DMA modes: mword0 mword1 mword2
> IORDY=on/off, tPIO={min:120,w/IORDY:120}, PIO modes: mode3 mode4
> UDMA modes: mode0 mode1 *mode2 mode3 mode4
> Drive Supports : ATA/ATAPI-4 T13 1153D revision 17 : ATA-1 ATA-2 ATA-3
> ATA-4
> ATA-5
>
> Output from hdparm -X68 /dev/hda:
>
> /dev/hda:
> setting xfermode to 68 (UltraDMA mode4)
>
> ...which logs...
> May 19 20:57:03 spock kernel: hda: Speed warnings UDMA 3/4 is not
> functional.
>
> Tony (3rd attempt hope netscape doesn't crash this time...)
>
> -
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>
Andre Hedrick
The Linux ATA/IDE guy
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